# -*- coding: utf-8 -*-#
#-------------------------------------------------------------------------------
# 建立者:        潘炎珍  
# Name:         demo07
# Description:
# Author:       98745
# Date:         2019/2/28
#-------------------------------------------------------------------------------

n1={}.fromkeys(['n','c','s'])
print(n1)
n2=n1.fromkeys(('n','c','s'))
print(n2)
n3=n1.fromkeys(['n','c','s'],'没有值')
print(n3)